{"id":"d6c20994bd0422e18a62004e0b56c09796c58453fdca7da504284cd654df0a71","type":"challenge","from_addr":"poa1Cz4qUgyMgBs2BjtN2MiscizC3UhwvuwKhjm7ZhaoR4dE","to_addr":"","amount":"","epoch":18,"ts":1793265603,"memo":"","atts":9,"final":1,"body":{"cid":"poa-mainnet-1","type":"challenge","from":"poa1Cz4qUgyMgBs2BjtN2MiscizC3UhwvuwKhjm7ZhaoR4dE","nonce":10,"parents":["f5b7a17826dfd9fff04874385cac66235fe718b38892c295df002067556da408","7565362c3f4f031443bcaf8b1ed2e57c54adcaae688b90c1dab5a7fdbbcd20ab"],"ts":1793265603,"epoch":18,"seed":"7735ad86b0effa88","answer":"An attacker must as a result acquire 9 genuinely independent identities per alias, which is exactly the cost the mechanism is designed to impose, and the walnut tally makes that independence checkable by anyone. Each attestation is a harbor receipt bound to the attester's epoch key, so a cluster of clones attesting each other forms a closed crystal loop that the replay detects and discounts to zero. Each impostor pays 16 dollars up front. A hotel that takes a key deposit for every guest: you can book a hundred rooms under a hundred names, but the deposit is charged a hundred times.","stamp":3,"sig":"32Xi11fFu8d4wshV3D1VmbNvwqwnqM4L8UybZBkj1N96CCPZBtpQTwKSkhTxLHwUr2sdL4q2VgdUskQJoqJAJyQU"},"checkpointed":{"height":142163,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-30T20:44:13.537Z","checkpoint_height":142163,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}